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f579e11940
PR-URL: https://github.com/nodejs/node/pull/26685 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com>
30 lines
855 B
JavaScript
30 lines
855 B
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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function foo(arg) {
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var value;
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// None of the branches of this switch are ever taken, but
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// the sequence means value could be the hole.
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switch (arg) {
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case 1:
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let let_var = 1;
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case 2:
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value = let_var;
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}
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// Speculative number binop with NumberOrOddball feedback.
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// Shouldn't be optimized to pure operator since value's phi
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// could theoretically be the hole (we would have already thrown a
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// reference error in case 2 above if so, but TF typing still
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// thinks it could be the hole).
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return value * undefined;
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}
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%PrepareFunctionForOptimization(foo);
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foo(3);
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foo(3);
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%OptimizeFunctionOnNextCall(foo);
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foo(3);
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